https://www.devex.com/people/how-do-i-add-an-infant-to-my-united-flight-reservation-2347268
https://www.devex.com/people/can-i-add-a-baby-to-my-booking-after-purchasing-a-ticket-on-united-2347298
https://www.devex.com/people/how-to-add-a-lap-infant-to-a-united-flight-after-booking-2347339
https://www.devex.com/people/can-i-add-a-lap-baby-to-my-alaska-airlines-booking-over-the-phone-2347820
https://www.devex.com/people/steps-to-add-a-lap-baby-to-an-existing-alaska-airlines-reservation-2347853